Graphics/AssociationItem.py

Tue, 12 Jan 2010 18:04:41 +0000

author
Detlev Offenbach <detlev@die-offenbachs.de>
date
Tue, 12 Jan 2010 18:04:41 +0000
changeset 51
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parent 13
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child 96
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permissions
-rw-r--r--

Renamed E4Graphics to E5Graphics.

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1 # -*- coding: utf-8 -*-
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2
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1af94a91f439 Changed copyright for 2010.
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3 # Copyright (c) 2004 - 2010 Detlev Offenbach <detlev@die-offenbachs.de>
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4 #
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5
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6 """
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7 Module implementing a graphics item for an association between two items.
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8 """
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9
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10 from PyQt4.QtCore import *
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11 from PyQt4.QtGui import *
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12
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13 from E5Graphics.E5ArrowItem import E5ArrowItem, NormalArrow, WideArrow
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14
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15 Normal = 0
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16 Generalisation = 1
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17 Imports = 2
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18
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19 NoRegion = 0
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20 West = 1
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21 North = 2
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22 East = 3
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23 South = 4
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24 NorthWest = 5
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25 NorthEast = 6
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26 SouthEast = 7
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27 SouthWest = 8
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28 Center = 9
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29
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30 class AssociationItem(E5ArrowItem):
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31 """
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32 Class implementing a graphics item for an association between two items.
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33
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34 The association is drawn as an arrow starting at the first items and
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35 ending at the second.
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36 """
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37 def __init__(self, itemA, itemB, type = Normal, parent = None):
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38 """
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39 Constructor
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40
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41 @param itemA first widget of the association
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42 @param itemB second widget of the association
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43 @param type type of the association. This must be one of
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44 <ul>
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45 <li>Normal (default)</li>
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46 <li>Generalisation</li>
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47 <li>Imports</li>
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48 </ul>
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49 @keyparam parent reference to the parent object (QGraphicsItem)
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50 """
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51 if type == Normal:
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52 arrowType = NormalArrow
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53 arrowFilled = True
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54 elif type == Imports:
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55 arrowType = NormalArrow
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56 arrowFilled = True
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57 elif type == Generalisation:
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58 arrowType = WideArrow
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59 arrowFilled = False
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60
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61 E5ArrowItem.__init__(self, QPointF(0, 0), QPointF(100, 100),
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62 arrowFilled, arrowType, parent)
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63
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64 self.setFlag(QGraphicsItem.ItemIsMovable, False)
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65 self.setFlag(QGraphicsItem.ItemIsSelectable, False)
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66
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67 ## self.calculateEndingPoints = self.__calculateEndingPoints_center
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68 self.calculateEndingPoints = self.__calculateEndingPoints_rectangle
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69
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70 self.itemA = itemA
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71 self.itemB = itemB
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72 self.assocType = type
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73
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74 self.regionA = NoRegion
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75 self.regionB = NoRegion
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76
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77 self.calculateEndingPoints()
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78
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79 self.itemA.addAssociation(self)
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80 self.itemB.addAssociation(self)
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81
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82 def __mapRectFromItem(self, item):
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83 """
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84 Private method to map item's rectangle to this item's coordinate system.
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85
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86 @param item reference to the item to be mapped (QGraphicsRectItem)
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87 @return item's rectangle in local coordinates (QRectF)
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88 """
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89 rect = item.rect()
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90 tl = self.mapFromItem(item, rect.topLeft())
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91 return QRectF(tl.x(), tl.y(), rect.width(), rect.height())
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92
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93 def __calculateEndingPoints_center(self):
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94 """
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95 Private method to calculate the ending points of the association item.
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96
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97 The ending points are calculated from the centers of the
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98 two associated items.
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99 """
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100 if self.itemA is None or self.itemB is None:
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101 return
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102
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103 self.prepareGeometryChange()
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104
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105 rectA = self.__mapRectFromItem(self.itemA)
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106 rectB = self.__mapRectFromItem(self.itemB)
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107 midA = QPointF(rectA.x() + rectA.width() / 2.0,
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108 rectA.y() + rectA.height() / 2.0)
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109 midB = QPointF(rectB.x() + rectB.width() / 2.0,
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110 rectB.y() + rectB.height() / 2.0)
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111 startP = self.__findRectIntersectionPoint(self.itemA, midA, midB)
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112 endP = self.__findRectIntersectionPoint(self.itemB, midB, midA)
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113
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114 if startP.x() != -1 and startP.y() != -1 and \
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115 endP.x() != -1 and endP.y() != -1:
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116 self.setPoints(startP.x(), startP.y(), endP.x(), endP.y())
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117
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118 def __calculateEndingPoints_rectangle(self):
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119 """
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120 Private method to calculate the ending points of the association item.
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121
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122 The ending points are calculated by the following method.
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123
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124 For each item the diagram is divided in four Regions by its diagonals
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125 as indicated below
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126 <pre>
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127 \ Region 2 /
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128 \ /
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129 |--------|
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130 | \ / |
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131 | \ / |
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132 | \/ |
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133 Region 1 | /\ | Region 3
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
134 | / \ |
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
135 | / \ |
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
136 |--------|
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
137 / \
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
138 / Region 4 \
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
139 </pre>
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
140
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
141 Each diagonal is defined by two corners of the bounding rectangle
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
142
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
143 To calculate the start point we have to find out in which
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
144 region (defined by itemA's diagonals) is itemB's TopLeft corner
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
145 (lets call it region M). After that the start point will be
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
146 the middle point of rectangle's side contained in region M.
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parents:
diff changeset
147
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parents:
diff changeset
148 To calculate the end point we repeat the above but in the opposite direction
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
149 (from itemB to itemA)
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
150 """
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
151 if self.itemA is None or self.itemB is None:
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
152 return
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
153
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
154 self.prepareGeometryChange()
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
155
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
156 rectA = self.__mapRectFromItem(self.itemA)
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
157 rectB = self.__mapRectFromItem(self.itemB)
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
158
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
159 xA = rectA.x() + rectA.width() / 2.0
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
160 yA = rectA.y() + rectA.height() / 2.0
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
161 xB = rectB.x() + rectB.width() / 2.0
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
162 yB = rectB.y() + rectB.height() / 2.0
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
163
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
164 # find itemA region
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
165 rc = QRectF(xA, yA, rectA.width(), rectA.height())
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
166 oldRegionA = self.regionA
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
167 self.regionA = self.__findPointRegion(rc, xB, yB)
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
168 # move some regions to the standard ones
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
169 if self.regionA == NorthWest:
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
170 self.regionA = North
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
171 elif self.regionA == NorthEast:
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
172 self.regionA = East
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
173 elif self.regionA == SouthEast:
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
174 self.regionA = South
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
175 elif self.regionA == SouthWest:
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
176 self.regionA = West
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
177 elif self.regionA == Center:
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
178 self.regionA = West
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
179
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
180 self.__updateEndPoint(self.regionA, True)
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parents:
diff changeset
181
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
182 # now do the same for itemB
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
183 rc = QRectF(xB, yB, rectB.width(), rectB.height())
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
184 oldRegionB = self.regionB
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
185 self.regionB = self.__findPointRegion(rc, xA, yA)
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
186 # move some regions to the standard ones
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
187 if self.regionB == NorthWest:
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
188 self.regionB = North
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
189 elif self.regionB == NorthEast:
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
190 self.regionB = East
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
191 elif self.regionB == SouthEast:
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
192 self.regionB = South
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
193 elif self.regionB == SouthWest:
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
194 self.regionB = West
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
195 elif self.regionB == Center:
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
196 self.regionB = West
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
197
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
198 self.__updateEndPoint(self.regionB, False)
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parents:
diff changeset
199
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
200 def __findPointRegion(self, rect, posX, posY):
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
201 """
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
202 Private method to find out, which region of rectangle rect contains the point
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
203 (PosX, PosY) and returns the region number.
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
204
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
205 @param rect rectangle to calculate the region for (QRectF)
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
206 @param posX x position of point (float)
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
207 @param posY y position of point (float)
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
208 @return the calculated region number<br />
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
209 West = Region 1<br />
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
210 North = Region 2<br />
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
211 East = Region 3<br />
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
212 South = Region 4<br />
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
213 NorthWest = On diagonal 2 between Region 1 and 2<br />
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
214 NorthEast = On diagonal 1 between Region 2 and 3<br />
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
215 SouthEast = On diagonal 2 between Region 3 and 4<br />
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
216 SouthWest = On diagonal 1 between Region4 and 1<br />
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
217 Center = On diagonal 1 and On diagonal 2 (the center)<br />
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
218 """
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
219 w = rect.width()
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
220 h = rect.height()
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
221 x = rect.x()
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
222 y = rect.y()
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
223 slope2 = w / h
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
224 slope1 = -slope2
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
225 b1 = x + w / 2.0 - y * slope1
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
226 b2 = x + w / 2.0 - y * slope2
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
227
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
228 eval1 = slope1 * posY + b1
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
229 eval2 = slope2 * posY + b2
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
230
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
231 result = NoRegion
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
232
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
233 # inside region 1
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
234 if eval1 > posX and eval2 > posX:
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
235 result = West
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
236
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
237 #inside region 2
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
238 elif eval1 > posX and eval2 < posX:
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
239 result = North
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
240
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
241 # inside region 3
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
242 elif eval1 < posX and eval2 < posX:
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
243 result = East
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
244
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
245 # inside region 4
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
246 elif eval1 < posX and eval2 > posX:
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
247 result = South
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
248
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
249 # inside region 5
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
250 elif eval1 == posX and eval2 < posX:
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
251 result = NorthWest
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
252
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
253 # inside region 6
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
254 elif eval1 < posX and eval2 == posX:
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
255 result = NorthEast
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
256
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
257 # inside region 7
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
258 elif eval1 == posX and eval2 > posX:
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
259 result = SouthEast
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
260
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
261 # inside region 8
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
262 elif eval1 > posX and eval2 == posX:
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
263 result = SouthWest
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
264
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
265 # inside region 9
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
266 elif eval1 == posX and eval2 == posX:
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
267 result = Center
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
268
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
269 return result
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
270
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
271 def __updateEndPoint(self, region, isWidgetA):
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
272 """
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
273 Private method to update an endpoint.
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
274
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
275 @param region the region for the endpoint (integer)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
276 @param isWidgetA flag indicating update for itemA is done (boolean)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
277 """
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
278 if region == NoRegion:
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
279 return
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
280
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
281 if isWidgetA:
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
282 rect = self.__mapRectFromItem(self.itemA)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
283 else:
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
284 rect = self.__mapRectFromItem(self.itemB)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
285 x = rect.x()
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
286 y = rect.y()
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
287 ww = rect.width()
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
288 wh = rect.height()
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
289 ch = wh / 2.0
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
290 cw = ww / 2.0
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
291
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
292 if region == West:
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
293 px = x
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
294 py = y + ch
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
295 elif region == North:
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
296 px = x + cw
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
297 py = y
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
298 elif region == East:
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
299 px = x + ww
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
300 py = y + ch
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
301 elif region == South:
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
302 px = x + cw
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
303 py = y + wh
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
304 elif region == Center:
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
305 px = x + cw
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
306 py = y + wh
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
307
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
308 if isWidgetA:
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
309 self.setStartPoint(px, py)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
310 else:
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
311 self.setEndPoint(px, py)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
312
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
313 def __findRectIntersectionPoint(self, item, p1, p2):
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
314 """
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
315 Private method to find the intersetion point of a line with a rectangle.
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
316
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
317 @param item item to check against
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
318 @param p1 first point of the line (QPointF)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
319 @param p2 second point of the line (QPointF)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
320 @return the intersection point (QPointF)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
321 """
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
322 rect = self.__mapRectFromItem(item)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
323 lines = [
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
324 QLineF(rect.topLeft(), rect.topRight()),
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
325 QLineF(rect.topLeft(), rect.bottomLeft()),
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
326 QLineF(rect.bottomRight(), rect.bottomLeft()),
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
327 QLineF(rect.bottomRight(), rect.topRight())
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
328 ]
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
329 intersectLine = QLineF(p1, p2)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
330 intersectPoint = QPointF(0, 0)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
331 for line in lines:
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
332 if intersectLine.intersect(line, intersectPoint) == \
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
333 QLineF.BoundedIntersection:
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
334 return intersectPoint
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
335 return QPointF(-1.0, -1.0)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
336
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
337 def __findIntersection(self, p1, p2, p3, p4):
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
338 """
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
339 Method to calculate the intersection point of two lines.
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
340
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
341 The first line is determined by the points p1 and p2, the second
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
342 line by p3 and p4. If the intersection point is not contained in
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
343 the segment p1p2, then it returns (-1.0, -1.0).
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
344
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
345 For the function's internal calculations remember:<br />
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
346 QT coordinates start with the point (0,0) as the topleft corner
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
347 and x-values increase from left to right and y-values increase
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
348 from top to bottom; it means the visible area is quadrant I in
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
349 the regular XY coordinate system
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
350
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
351 <pre>
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
352 Quadrant II | Quadrant I
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
353 -----------------|-----------------
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
354 Quadrant III | Quadrant IV
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
355 </pre>
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
356
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
357 In order for the linear function calculations to work in this method
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
358 we must switch x and y values (x values become y values and viceversa)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
359
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
360 @param p1 first point of first line (QPointF)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
361 @param p2 second point of first line (QPointF)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
362 @param p3 first point of second line (QPointF)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
363 @param p4 second point of second line (QPointF)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
364 @return the intersection point (QPointF)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
365 """
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
366 x1 = p1.y()
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
367 y1 = p1.x()
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
368 x2 = p2.y()
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
369 y2 = p2.x()
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
370 x3 = p3.y()
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
371 y3 = p3.x()
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
372 x4 = p4.y()
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
373 y4 = p4.x()
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
374
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
375 # line 1 is the line between (x1, y1) and (x2, y2)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
376 # line 2 is the line between (x3, y3) and (x4, y4)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
377 no_line1 = True # it is false, if line 1 is a linear function
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
378 no_line2 = True # it is false, if line 2 is a linear function
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
379 slope1 = 0.0
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
380 slope2 = 0.0
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
381 b1 = 0.0
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
382 b2 = 0.0
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
383
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
384 if x2 != x1:
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
385 slope1 = (y2 - y1) / (x2 - x1)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
386 b1 = y1 - slope1 * x1
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
387 no_line1 = False
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
388 if x4 != x3:
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
389 slope2 = (y4 - y3) / (x4 - x3)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
390 b2 = y3 - slope2 * x3
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
391 no_line2 = False
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
392
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
393 pt = QPointF()
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
394 # if either line is not a function
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
395 if no_line1 and no_line2:
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
396 # if the lines are not the same one
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
397 if x1 != x3:
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
398 return QPointF(-1.0, -1.0)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
399 # if the lines are the same ones
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
400 if y3 <= y4:
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
401 if y3 <= y1 and y1 <= y4:
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
402 return QPointF(y1, x1)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
403 else:
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
404 return QPointF(y2, x2)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
405 else:
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
406 if y4 <= y1 and y1 <= y3:
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
407 return QPointF(y1, x1)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
408 else:
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
409 return QPointF(y2, x2)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
410 elif no_line1:
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
411 pt.setX(slope2 * x1 + b2)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
412 pt.setY(x1)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
413 if y1 >= y2:
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
414 if not (y2 <= pt.x() and pt.x() <= y1):
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
415 pt.setX(-1.0)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
416 pt.setY(-1.0)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
417 else:
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
418 if not (y1 <= pt.x() and pt.x() <= y2):
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
419 pt.setX(-1.0)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
420 pt.setY(-1.0)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
421 return pt
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
422 elif no_line2:
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
423 pt.setX(slope1 * x3 + b1)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
424 pt.setY(x3)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
425 if y3 >= y4:
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
426 if not (y4 <= pt.x() and pt.x() <= y3):
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
427 pt.setX(-1.0)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
428 pt.setY(-1.0)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
429 else:
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
430 if not (y3 <= pt.x() and pt.x() <= y4):
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
431 pt.setX(-1.0)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
432 pt.setY(-1.0)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
433 return pt
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
434
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
435 if slope1 == slope2:
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
436 pt.setX(-1.0)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
437 pt.setY(-1.0)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
438 return pt
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
439
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
440 pt.setY((b2 - b1) / (slope1 - slope2))
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
441 pt.setX(slope1 * pt.y() + b1)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
442 # the intersection point must be inside the segment (x1, y1) (x2, y2)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
443 if x2 >= x1 and y2 >= y1:
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
444 if not ((x1 <= pt.y() and pt.y() <= x2) and (y1 <= pt.x() and pt.x() <= y2)):
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
445 pt.setX(-1.0)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
446 pt.setY(-1.0)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
447 elif x2 < x1 and y2 >= y1:
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
448 if not ((x2 <= pt.y() and pt.y() <= x1) and (y1 <= pt.x() and pt.x() <= y2)):
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
449 pt.setX(-1.0)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
450 pt.setY(-1.0)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
451 elif x2 >= x1 and y2 < y1:
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
452 if not ((x1 <= pt.y() and pt.y() <= x2) and (y2 <= pt.x() and pt.x() <= y1)):
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
453 pt.setX(-1.0)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
454 pt.setY(-1.0)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
455 else:
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
456 if not ((x2 <= pt.y() and pt.y() <= x1) and (y2 <= pt.x() and pt.x() <= y1)):
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
457 pt.setX(-1.0)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
458 pt.setY(-1.0)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
459
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
460 return pt
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
461
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
462 def widgetMoved(self):
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
463 """
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
464 Public method to recalculate the association after a widget was moved.
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
465 """
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
466 self.calculateEndingPoints()
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
467
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
468 def unassociate(self):
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
469 """
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
470 Public method to unassociate from the widgets.
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
471 """
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
472 self.itemA.removeAssociation(self)
51
7d80b0f20ca6 Renamed E4Graphics to E5Graphics.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 13
diff changeset
473 self.itemB.removeAssociation(self)

eric ide

mercurial